Improvement in padlocks



ILPETERS. PHOTO-LITHDGRAFMER, WASHINGTON. D c:

Louis H ILLEBRAND, or PHILADELPHIA, PENNSYLVANIA.

Lettef'rs Patent No. 100,403, lated March 1, 14870.

-QW mPRovnMEN-r In PADLocKs.

} L Vflihe Schedule referred to in` these Letters Patent and making partof 'the same To all whom it may concern Y Be it known that I, LoUIsHILLEBBAND, of the city and county of Philadelphia, and State of Penn ySylvania, have invented new and useful Improvements in Padlocks; and Ido hereby declare the following to A bea clear and exact description ofthe nature thereof,

sufficient to enable others skilled iu the art to which my inventionappertains to fully understand and use the same, `reference being had tothe accompanying drawings making` part of this specification, in which-Figure 4lis a view ot' my improved padlock when closed, thecovering-plate being removed to show the parts.`

Figure 2 is a similar view when unlocked. 4

Figures 3, 4, 5, Iand 6 are detached views of diier ent parts. A l

Like letters of reference indicate like parts in the several figures. i

and arranged in relation to the fulcrum of the key` The inner face of ahooked-shaped bit of the key rides over the cam and draws the bolt, andAthus opens the lock; The key `can then be turned in either directionwithout 'disturbing the -bolt or operating it ntilAit is again locked.

arepresents the casing of my improved padlock, to .which the shackle bis hingedat c.

The nose of this shackle is provided with a slot, (1,4

into which the tongue e of the bolt seizes, a projec- `tion, f, on thebolt, forming, with the' projection g on A the casing, a place yfor thenose of the shackle when locked. y p A In iig. 4 is shown the bolt withits tongue e and projection f. l i A It is provided also with -twoslotsfone slot, h., being oblong, in the center of the bolt, and havinga eam,`c',

raisingfrom the upper end of it, serves to allow the bolt-plate to playfreely around the fulcrum j of the key, which is formed on thecasng`,and the other slot, k, also oblong and formed to' the right ofslot'i, allows the bolt-,plate to move freely around the pivot of thetumbler or Jtumblers l." A i The boltl has also a shoulder, `cra-whichacts against the arm n, attached to or formed on the heel of the eshackle b. A

'l l On the rear of the tongue c of the boltis formed a littleprojection, o, which, when the lock is open, seizes into a notch, p, inthe tumbler l, the part of which latter, above this notch, bears againstthe projection oAwhen the lock is closed, and prevents the `A bolt frommoving backward to release the nose of the A shackle. A A A The bolt andthe tumbler are pivoted at opposite sides of the casing, the latterbeing kept in position, as shown in fig. 1, by means of a spring, q,attached, with one end to the tumbler, and bearing with the otheragainst a shoulder' in the top of the casing.

One arm, r, of' a spring, pivoted at s, bears against the underside ofthe bolt, having a tendency to keep i the latter `in position, as shownin iig-1, while the other arm, `t, bearing 'against a -pin on the heelof the shackle below its fulcrum, has a tendency to throw the shacklebackward when releasedy from the bolt.

The operation of my lock isas follows: l The key, which is shown in iig.6, and has a hooked bit, u, which, on its inside or inner face, isslightly curved tocorrespond to the shape of cam i, is placed in itsfulcrum and turned. The outer face pressing against the inner face ofthe tumbler, raises the same d unt-il the notch p comes in position toreceive the pro My invention consists in a camformed on the boltAjection o ofthe tongue of the bolt, when, the tumbler having been movedto thefull extent possible, its inner face new becomes the bearingagainst which `the outer face of the bit 'u operates, while, with itscurvedl inner face. riding over the cam fi, it forces the bolt thetongue e from the notch d in the nose of `the shackle, which latter, bythe force of spring-arm t exerted against its heel, isthrown backward,thus opening the lock. v

'While the shackle is out .of the lock or casing the arm fn, stillbearing against the bolt 'at Ithe rear of its fulcrum, prevents the boltfrom locking, until the arm, in the Iclosing movement of the shackle,passes the end of shoulder lm, which takes place only when the notch din the nose of the shackle is in position to receive the tongue e. I Inclosing the look, 'the bolt is actuated by spring arm fr, and thevtumbler moved to its normal position as soon as projection o has leftslot p by means of the or tnmblers.

the cam occupies such position that the key can be the key will ridefreely over the cam Without 'disturbturned to the right or left withoutdisturbing the bolt ing the bolt or tumbler, substantially as set forth.

The above signed by me this 4th day of February7 Having thus describedmy invention, 1870.

What I claim as new therein, and desire to secure by Letters Patent, is-

The cam formed on the bolt, and operated by the inner face of thekey-bit, and arranged relatively with the fulerum of the key, so thatwhen the lock is open LOUIS HILLEBRAND.

Witnesses:

JOHN A. WIEDERSHEIM, FRANCIS KUYSER.

